Wentworth Miller's Leonard Snart (Captain Cold) is getting a sister on The CW's "The Flash."

ComicBook.com is reporting that "The Tomorrow People" alum Peyton List is joining the hit show as the Captain's little sister, Lisa Snart.

While Leonard is cold and calculating, Lisa is a ne'er-do-well and eager to prove to her big brother she's got what it takes to be in his criminal gang. She is sly, charming and even a little sadistic. She's also not afraid to use her sexuality to get what she wants, which will put her on a collision course with S.T.A.R. Labs employee and friend of The Flash...Cisco Ramon (Carlos Valdes).

Peyton's first episode of the show, Episode 116, titled "Rogue Time," will air next year. In the realm of DC Comics, her character is known as The Golden Glider who has the ability to "skate" on any surface. She's also known to use explosive jewels when things get sticky.

Leonard Snart, whom Cisco nicknamed Captain Cold, quickly became a thorn in The Flash's (Grant Gustin) side, when he made his debut earlier in the season. While not a meta-human, Leonard acquired some technology (a powerful freeze gun), built by Cisco, which helps aid him in his criminal pursuits in Central City. He is expected to expand his associations (The Rogues), hooking up with Heat Wave (played by Dominic Purcell) when "The Flash" returns in January on The CW.

In the final season of "The Tomorrow People," Peyton played Cara on alongside Robbie Amell. Robbie is currently on "The Flash" playing Ronnie Raymond/Firestorm, the once-thought-dead fiancé of S.T.A.R. Labs' Caitlin Snow (Danielle Panabaker).

"The Flash" returns with new episodes on January 20 on The CW.